Patent
Electric arc welding
TLDR
In this article, the high-frequency inductor or transformer disposed in the welding circuit and necessary for the injection of the highfrequency current has a core of ferrite material or powdered iron and is arranged to saturate at normal welding currents so as to offer little impedance to the flow of welding current.Abstract:
722,494. Supply systems for welding arcs. AIR REDUCTION CO., Inc. Dec. 8, 1952 [Dec. 28, 1951], No. 31074/52. Drawings to Specification. Class 38 (4). To permit the employment of a relatively low high-frequency (say 50 to 500 kcs. per sec.) current for starting and stabilizing a D.C. or low-frequency A.C. welding arc, the highfrequency inductor or transformer disposed in the welding circuit and necessary for the injection of the high-frequency current has a core of ferrite material or powdered iron and is arranged to saturate at normal welding currents so as to offer little impedance to the flow of welding current, but to be unsaturated by the high-frequency currents alone, so as to offer high impedance to these-and thus provide good injection of high-frequency currentwhen the arc extinguishes. The high-frequency generator may comprise a push-pull valve oscillator normally cut off by external bias, but triggered into oscillation by a voltage pulse induced in a winding of the injection transformer upon interruption of the flow of welding current.read more
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Methods and apparatus of welding using electrodes with coaxial power feed
TL;DR: In this paper, a welding method using electrodes with coaxial power feed is described, where a metal cylinder is formed of pure metals or extrudable alloys for forming a desired superalloy material composition; while the delivered core feed materials comprise a balance of compositional constituents for forming the desired super alloy material composition.
Patent
Schaltanordnung fuer ein Schutzgasschweissgeraet mit Leervorschub der abschmelzenden Elektrode
Patent
Fillet welded assembly and method for its creation
Martin Vitásek,Tomás Szabo +1 more
TL;DR: The ratio of height of the fillet welded joint on the side of the austenitic sleeve (2) to width (b) of a fillet-welded joint in the area of an upper flange of a control socket at the reactor's upper cover is 1:2 to 1:3 as mentioned in this paper.
References
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Patent
Separation of the constituents of gaseous mixtures
TL;DR: In this article, a method for the liquefaction and separation of ternary gaseous mixtures for the purpose of recovering the constituents of air is described, particularly adapted for the separation of the principal constituents.
Patent
Arc welding apparatus
TL;DR: In this article, it was shown that it is desirable to avoid the inclusion of oxides and nitrides in the weld metal, since their inclusion causes hardness and brittleness and further degradation.